#include "../Eigen/Core"

using namespace Eigen;

void
call_ref(Ref<VectorXf> a)
{
}

int
main()
{
	VectorXf a(10);
	DenseBase<VectorXf>& ac(a);
#ifdef EIGEN_SHOULD_FAIL_TO_BUILD
	call_ref(ac);
#else
	call_ref(ac.derived());
#endif
}
